Dark Vision

Dark Vision acts like Batman's "Detective Mode" in Arkham City and Arkham Asylum; it lets Corvo see enemies through walls (including their cone of vision), easing the task of evading enemies and shadowing what they do.

Corvo's footsteps and other noise originating from him (like dropping items) will be visible as well. Improving the power to level two will highlight security systems and objects you can interact with. The security systems and their power cords will be visible, so you can follow their cords and cut off their energy supply.

Dark Vision can be used in conjuction with other powers. For example, Corvo can activate Dark Vision and still use Blink to move around guards without leaving the Dark Vision view. Although the amount of time Dark VIsion can be active is quite long, it will automatically disable.

Dark Vision does not allow you to see all the guards from an infinite distance. It has a fairly large radius, but guards you can see in the distance may not be highlighted by Dark Vision.